Write the series 1- 0.5- 2+ ... for 12 terms using summation notation. O A. 12 E(-1.5n+ 2.5) i=2 O B. 12 E(1-0.5n) O C. 12 (2.5-1.5x) O D. (-1.5x+1)17 Evaluate the summation E (-12 + 2) . O A. 126 O B. 117 O C. 102 O D. 429 Which of the following expressions correctly uses properties of summation to represent the summation [ (32 + 87-5) ? O A. 9 9 +8:-[9.5] i=1 i= 1 O B. 9 9 9 3 + i+8i -[9.5] i=1 i=1 i=1 O C. 9 9 2 8 M M 1=1 1=1 O D. 9 3 2+87i-[5] IM i=119 Which of the following expressions can be used to evaluate the summation (3 -1) ? i=1 O A. 19(19+1) (2(19) +1) 3. - (1. 19) 6 O B. 19 (19+1) 3. - (1.19) 2 O C. 192 (19+ 1 ) 3 -(1.19) 4 O D. 19 (19+1) 3 . - (1.19) 4